diff --git a/lib/types.h b/lib/types.h
index d1bfd2b4..0c439722 100644
--- a/lib/types.h
+++ b/lib/types.h
@@ -1,5 +1,5 @@
 /*
-    $Id: types.h,v 1.2 2003/04/07 11:29:06 rocky Exp $
+    $Id: types.h,v 1.3 2003/04/10 04:10:38 rocky Exp $
 
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2002,2003 Rocky Bernstein <rocky@panix.com>
@@ -206,6 +206,11 @@ extern "C" {
   */
 #define CDIO_INVALID_LBA   0xFFFFFFFF
   
+  /*! 
+    Constant for invalid LSN
+  */
+#define CDIO_INVALID_LSN   0xFFFFFFFF
+  
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */